Propagation Length of Surface Plasmons in a Metal Film with Roughness

Overview

Journal Appl Opt

Date 2009 Oct 22

PMID 19844301

Citations 7

Authors

Andrei Kolomenski

Alexandre Kolomenskii

John Noel

Siying Peng

Hans Schuessler

Affiliations

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Abstract

The propagation of laser-excited surface plasmons along a gold film with surface roughness is directly observed via scattered light. The attenuation length of surface plasmons in a broad wavelength interval is calculated for smooth gold and silver films. The surface roughness, which was characterized with an AFM, introduces corrections to the attenuation length, angular dependence of the surface plasmon resonance, and the effective dielectric constant of the metal film. These corrections are also taken into account and discussed.

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